Royal Yolk is a Legends of Idleon item: dropped by 1 monster, used in 2 recipes, upgrades 1 bonus. Sometimes it's fun to poke at the yellow outisde and watch the yellow insides ooze out...

Royal Yolk | Idleon Toolbox

Sometimes it's fun to poke at the yellow outisde and watch the yellow insides ooze out...

Royal_Yolk

The_Jade_Cost_of_'Currency_Conduit'_scales_{%_slower,_making_it_cheaper,_allowing_you_to_buy_it_more_and_get_more_JADE!